19091919100 has 36 divisors (see below), whose sum is σ = 41450643864. Its totient is φ = 7632863680.

The previous prime is 19091919079. The next prime is 19091919109. The reversal of 19091919100 is 191919091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19091919109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151899 + ... + 247501.

It is an arithmetic number, because the mean of its divisors is an integer number (1151406774).

Almost surely, 2^19091919100 is an apocalyptic number.

19091919100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19091919100 is an abundant number, since it is smaller than the sum of its proper divisors (22358724764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19091919100 is a wasteful number, since it uses less digits than its factorization.

19091919100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97614 (or 97607 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 40.

The spelling of 19091919100 in words is "nineteen billion, ninety-one million, nine hundred nineteen thousand, one hundred".